sys: rename from linux

Signed-off-by: Ophestra <cat@gensokyo.uk>

2 files changed, 0 insertions, 177 deletions

diff --git a/internal/linux/interface.go b/internal/linux/interface.go
deleted file mode 100644
index 762414c8..00000000
--- a/internal/linux/interface.go
+++ /dev/null
@@ -1,70 +0,0 @@
-package linux
-
-import (
-	"io/fs"
-	"os/user"
-	"path"
-	"strconv"
-
-	"git.gensokyo.uk/security/fortify/internal/fmsg"
-)
-
-// System provides safe access to operating system resources.
-type System interface {
-	// Geteuid provides [os.Geteuid].
-	Geteuid() int
-	// LookupEnv provides [os.LookupEnv].
-	LookupEnv(key string) (string, bool)
-	// TempDir provides [os.TempDir].
-	TempDir() string
-	// LookPath provides [exec.LookPath].
-	LookPath(file string) (string, error)
-	// MustExecutable provides [proc.MustExecutable].
-	MustExecutable() string
-	// LookupGroup provides [user.LookupGroup].
-	LookupGroup(name string) (*user.Group, error)
-	// ReadDir provides [os.ReadDir].
-	ReadDir(name string) ([]fs.DirEntry, error)
-	// Stat provides [os.Stat].
-	Stat(name string) (fs.FileInfo, error)
-	// Open provides [os.Open]
-	Open(name string) (fs.File, error)
-	// EvalSymlinks provides [filepath.EvalSymlinks]
-	EvalSymlinks(path string) (string, error)
-	// Exit provides [os.Exit].
-	Exit(code int)
-
-	// Paths returns a populated [Paths] struct.
-	Paths() Paths
-	// Uid invokes fsu and returns target uid.
-	// Any errors returned by Uid is already wrapped [fmsg.BaseError].
-	Uid(aid int) (int, error)
-}
-
-// Paths contains environment dependent paths used by fortify.
-type Paths struct {
-	// path to shared directory e.g. /tmp/fortify.%d
-	SharePath string `json:"share_path"`
-	// XDG_RUNTIME_DIR value e.g. /run/user/%d
-	RuntimePath string `json:"runtime_path"`
-	// application runtime directory e.g. /run/user/%d/fortify
-	RunDirPath string `json:"run_dir_path"`
-}
-
-// CopyPaths is a generic implementation of [System.Paths].
-func CopyPaths(os System, v *Paths) {
-	v.SharePath = path.Join(os.TempDir(), "fortify."+strconv.Itoa(os.Geteuid()))
-
-	fmsg.Verbosef("process share directory at %q", v.SharePath)
-
-	if r, ok := os.LookupEnv(xdgRuntimeDir); !ok || r == "" || !path.IsAbs(r) {
-		// fall back to path in share since fortify has no hard XDG dependency
-		v.RunDirPath = path.Join(v.SharePath, "run")
-		v.RuntimePath = path.Join(v.RunDirPath, "compat")
-	} else {
-		v.RuntimePath = r
-		v.RunDirPath = path.Join(v.RuntimePath, "fortify")
-	}
-
-	fmsg.Verbosef("runtime directory at %q", v.RunDirPath)
-}
diff --git a/internal/linux/std.go b/internal/linux/std.go
deleted file mode 100644
index 89338f19..00000000
--- a/internal/linux/std.go
+++ /dev/null
@@ -1,107 +0,0 @@
-package linux
-
-import (
-	"errors"
-	"fmt"
-	"io/fs"
-	"log"
-	"os"
-	"os/exec"
-	"os/user"
-	"path/filepath"
-	"strconv"
-	"sync"
-	"syscall"
-
-	"git.gensokyo.uk/security/fortify/internal"
-	"git.gensokyo.uk/security/fortify/internal/fmsg"
-)
-
-// Std implements System using the standard library.
-type Std struct {
-	paths     Paths
-	pathsOnce sync.Once
-
-	uidOnce sync.Once
-	uidCopy map[int]struct {
-		uid int
-		err error
-	}
-	uidMu sync.RWMutex
-}
-
-func (s *Std) Geteuid() int                                 { return os.Geteuid() }
-func (s *Std) LookupEnv(key string) (string, bool)          { return os.LookupEnv(key) }
-func (s *Std) TempDir() string                              { return os.TempDir() }
-func (s *Std) LookPath(file string) (string, error)         { return exec.LookPath(file) }
-func (s *Std) MustExecutable() string                       { return internal.MustExecutable() }
-func (s *Std) LookupGroup(name string) (*user.Group, error) { return user.LookupGroup(name) }
-func (s *Std) ReadDir(name string) ([]os.DirEntry, error)   { return os.ReadDir(name) }
-func (s *Std) Stat(name string) (fs.FileInfo, error)        { return os.Stat(name) }
-func (s *Std) Open(name string) (fs.File, error)            { return os.Open(name) }
-func (s *Std) EvalSymlinks(path string) (string, error)     { return filepath.EvalSymlinks(path) }
-func (s *Std) Exit(code int)                                { internal.Exit(code) }
-
-const xdgRuntimeDir = "XDG_RUNTIME_DIR"
-
-func (s *Std) Paths() Paths {
-	s.pathsOnce.Do(func() { CopyPaths(s, &s.paths) })
-	return s.paths
-}
-
-func (s *Std) Uid(aid int) (int, error) {
-	s.uidOnce.Do(func() {
-		s.uidCopy = make(map[int]struct {
-			uid int
-			err error
-		})
-	})
-
-	{
-		s.uidMu.RLock()
-		u, ok := s.uidCopy[aid]
-		s.uidMu.RUnlock()
-		if ok {
-			return u.uid, u.err
-		}
-	}
-
-	s.uidMu.Lock()
-	defer s.uidMu.Unlock()
-
-	u := struct {
-		uid int
-		err error
-	}{}
-	defer func() { s.uidCopy[aid] = u }()
-
-	u.uid = -1
-	if fsu, ok := internal.Check(internal.Fsu); !ok {
-		fmsg.BeforeExit()
-		log.Fatal("invalid fsu path, this copy of fortify is not compiled correctly")
-		// unreachable
-		return 0, syscall.EBADE
-	} else {
-		cmd := exec.Command(fsu)
-		cmd.Path = fsu
-		cmd.Stderr = os.Stderr // pass through fatal messages
-		cmd.Env = []string{"FORTIFY_APP_ID=" + strconv.Itoa(aid)}
-		cmd.Dir = "/"
-		var (
-			p         []byte
-			exitError *exec.ExitError
-		)
-
-		if p, u.err = cmd.Output(); u.err == nil {
-			u.uid, u.err = strconv.Atoi(string(p))
-			if u.err != nil {
-				u.err = fmsg.WrapErrorSuffix(u.err, "cannot parse uid from fsu:")
-			}
-		} else if errors.As(u.err, &exitError) && exitError != nil && exitError.ExitCode() == 1 {
-			u.err = fmsg.WrapError(syscall.EACCES, "") // fsu prints to stderr in this case
-		} else if os.IsNotExist(u.err) {
-			u.err = fmsg.WrapError(os.ErrNotExist, fmt.Sprintf("the setuid helper is missing: %s", fsu))
-		}
-		return u.uid, u.err
-	}
-}